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Repair Sharing

Repair Sharing. [P8P67 LE]: Halt at B2 The Initial Problem Analysis: 1 : Visually check MB slot for damage. Check front and back of the board for line breaks. 2: Check SX1 if it has 32.768 KHz or not. Check PU16 PIN2 +3VSB and OR1 PIN1 +3VSB_ATX are normal.

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Repair Sharing

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  1. Repair Sharing • [P8P67 LE]: Halt at B2 • The Initial Problem Analysis: • 1 : Visually check MB slot for damage. Check front and back of the board for line breaks. • 2: Check SX1 if it has 32.768 KHz or not. Check PU16 PIN2 +3VSB and OR1 PIN1 +3VSB_ATX are normal. • 3: After plugging CPU and power on, VGA card has no display at B2 code. • 4: Definition and Type of no display: • A. B2 is about detecting PCIE function • B. Some data would show it’s detecting others bus of SB, like: SIO LPC • Repair process Visually Check Measure VCORE and GFX CK_100M_DMI CPU Frequency SignalH_CPURST#S_CPUPWRGD +3V, 3VSB, 3VSB_ADV +1.05V 1.8VSFR VCCIO 3_3P3_DAV_FB VCCDMI_PLL_PCH VCCA_DPLLB VCCA_DPLLA SB Power

  2. 25MHz CK_14M_PCH CK_96M_PCH CK_100M_PCH CK_100M_DMI CK_100M_USB3 CK_100M_EATA CK_100M_SATA CK_100M_LAN SB Frequency SB Others Signals O_PWROK S_PLTRST# Check SATA (mavell 9172, if fail, it’s possible to halt at “94”) USB3, LAN… Try to remove PCIE device chipset to confirm When removing U3U1(USB3 chipset), it’s very hot. Try to exchange a new one to solve this case. PCIE Device If it still fail SIO Condition Check SIO Power+BAT+3V+3VAB_ATX Check SIO Frequency33M48M Check PG and RST signalsASUS_ENO_PWROKS_PLTRST# Check LPC signalsS_LAD[0:3]LFRAME Check power detect pin impedance (voltage divider resistor)O_VCOREREFEINO_12VINO_5VINVCOREIN Problem: B2 caused from “SIO 12V sense pin floating”. Check SIOPIN O_+12VINhas 0V (normal voltage is about 1V)，check O_+12VIN voltage divider resistor and find OR23 is OPEN. Try to exchange OR23 to solve this case.

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